
Home Additions in Harrisburg, PA
Home additions in Harrisburg, PA represent a strategic investment for homeowners seeking expanded living space, enhanced property value, and customized functionality tailored to Central Pennsylvania's unique architectural landscape. Whether you're planning a sunroom addition to capture natural light year-round or designing a second-story expansion to accommodate a growing family, understanding the local building codes, climate considerations, and construction best practices ensures your project delivers lasting value. BiiLT Group specializes in seamlessly integrating new spaces with existing structures while navigating Harrisburg's specific zoning requirements and seasonal construction challenges that define successful home expansions in South Central Pennsylvania.

What Are the Most Popular Types of Home Additions?
Room additions in Harrisburg typically fall into several categories based on homeowner needs and property constraints. Single-story room expansions remain the most common choice, extending kitchens, creating primary bedroom suites, or adding dedicated home offices that reflect post-2020 remote work trends.
Sunroom additions capture significant interest among Harrisburg homeowners who want year-round enjoyment despite Pennsylvania's variable climate.
These glass-enclosed spaces require specialized insulation rated for temperature swings between 24°F winter lows and 85°F summer highs, as documented by NOAA's Harrisburg climate data. In-law suites have surged in popularity, with the U.S. Census Bureau reporting that multigenerational households in the United States increased from 5.1 million in 2010 to 6.0 million in 2020, driving demand for self-contained living spaces with separate entrances, kitchenettes, and accessible bathrooms.
How do room additions work in older homes?
Harrisburg's housing stock includes numerous properties built between 1920 and 1960, presenting unique structural considerations for additions. Foundation compatibility becomes the primary concern when adding to older homes, as original footings may require reinforcement to support additional loads.
Electrical and plumbing systems in older homes often need upgrading to meet current codes before supporting an addition. Pennsylvania's Uniform Construction Code requires electrical service sized according to load calculations for modern additions, while many older Harrisburg homes operate on 100-amp systems. BiiLT Group coordinates these infrastructure upgrades during the planning phase, preventing costly delays once construction begins. Matching original architectural details like crown molding profiles, window trim styles, and exterior siding patterns ensures the addition appears original to the home rather than an obvious afterthought.
Are second-story additions allowed in Harrisburg?
Second-story additions are permitted throughout most of Harrisburg's residential zones, though specific height restrictions and setback requirements vary by neighborhood. The Harrisburg Zoning Code Chapter 7-303 establishes maximum building heights of 35 feet in R-1 and R-2 residential districts, typically accommodating a full second story on single-story homes. Historic districts like Midtown and Bellevue Park enforce additional design review requirements through the Historic Architectural Review Board.
Structural engineering becomes critical for second-story projects, as existing first-floor walls and foundations must support significant additional weight. Load calculations must account for Pennsylvania's snow load requirements of 30 pounds per square foot in Harrisburg, plus the weight of new framing, flooring, and furnishings. BiiLT Group partners with licensed structural engineers to ensure your existing home can safely support vertical expansion while meeting all state and local building codes.

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Why Add a Room? Key Benefits for Homeowners
Home additions address evolving family needs while building long-term property value in Harrisburg's competitive real estate market. Growing families gain dedicated spaces for children's bedrooms, playrooms, or study areas without the disruption and expense of relocating. Remote workers establish professional home offices with proper sound insulation and dedicated electrical circuits for technology needs.
Lifestyle enhancements drive many addition decisions, from creating entertainment spaces for hosting to establishing quiet retreats for hobbies and relaxation. Aging-in-place modifications like first-floor primary suites eliminate stair-climbing concerns while maintaining independence. BiiLT Group designs additions that solve immediate space challenges while anticipating future needs, ensuring your investment delivers value for decades.
Does a home addition increase property value?
Strategic home additions consistently boost property values in Harrisburg's real estate market when executed properly. The Remodeling 2023 Cost vs. Value Report shows that midrange primary suite additions in the Mid-Atlantic region recoup 30% of costs at resale. Location-specific factors like matching neighborhood home sizes and maintaining architectural consistency significantly impact value recovery.
Square footage increases matter most in neighborhoods where your home falls below the median size. Adding 400 square feet to a 1,200-square-foot home in Camp Hill or Mechanicsburg creates proportionally more value than the same addition to a 2,800-square-foot property. Quality of construction and integration with existing structures determine whether additions enhance or detract from curb appeal. BiiLT Group's design-build approach ensures additions complement your home's character while meeting contemporary buyer expectations for open layouts, natural light, and energy efficiency.
How can I design for multi-generational living?
Multi-generational home designs require thoughtful planning to balance privacy with connection. Successful in-law suites incorporate separate entrances, allowing independent access without disrupting the main household.
Universal design principles guide multi-generational spaces, including 36-inch doorways for wheelchair access, lever-style door handles, and curbless shower entries. Kitchenette additions provide cooking independence while shared spaces like expanded family rooms encourage interaction. Sound insulation between living areas maintains privacy, while connected HVAC systems ensure comfortable temperatures throughout. BiiLT Group incorporates aging-in-place features seamlessly, creating spaces that serve families today while adapting to future needs.


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How Much Do Home Additions Cost in Harrisburg, PA?
Home addition costs in Harrisburg range from $80 to $200 per square foot for ground-level additions, according to Angi. Basic room additions without plumbing average lower costs, while bathroom additions requiring plumbing run higher. Second-story additions command premium pricing at $300-$500 per square foot due to structural reinforcement needs and roofing modifications.
A typical 400-square-foot family room addition costs $32,000-$80,000, including foundation work, framing, electrical, HVAC extension, insulation, drywall, flooring, and windows, according to Angi. Kitchen expansions cost more due to cabinetry, appliances, and plumbing requirements, often reaching $200-$300 per square foot for full renovations. BiiLT Group provides detailed estimates breaking down material and labor costs, helping homeowners understand exactly where their investment goes while identifying opportunities for value engineering without compromising quality.
What factors affect the cost per square foot?
Site conditions significantly impact addition costs in Harrisburg's varied terrain. Sloped lots require additional excavation and potentially engineered retaining walls to foundation costs.
Material selections create the widest cost variations within additions. Vinyl windows cost less than high-efficiency triple-pane units. Flooring choices range from carpet to hardwood. Insulation upgrades to achieve ENERGY STAR certification add to costs but reduce long-term heating and cooling costs. BiiLT Group helps clients balance upfront costs with long-term value, recommending materials that deliver the best return on investment for each specific project.
How to budget effectively for a large addition?
Successful addition budgeting starts with comprehensive planning that anticipates both visible and hidden costs. Beyond construction expenses, budgets must include architectural design fees, permit fees, and contingencies for unexpected conditions.
Phased construction offers budget flexibility for large additions. Starting with structural work and weather-tight enclosure allows homeowners to complete interior finishes over time as finances permit. BiiLT Group structures contracts to accommodate phased approaches while maintaining warranty coverage. Financing options through home equity loans or construction-to-permanent mortgages spread costs over time. Current rates from Pennsylvania credit unions average 7-8% for home equity products, making monthly payments manageable for many household budgets.

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What's the Process for a Home Addition Project?
The home addition process follows a predictable sequence from initial concept through final inspection. Design development requires time for simple additions or longer for complex projects requiring architectural drawings. Permit approval in Harrisburg varies for standard residential additions. Construction timelines depend on addition size and complexity, with most projects completing after breaking ground.
BiiLT Group manages each phase systematically, beginning with on-site consultations to assess existing conditions and discuss your vision. Our design team creates preliminary drawings for your review, refining details through collaborative feedback. Once designs are finalized, we handle all permit applications and coordinate required inspections. During construction, dedicated project managers provide weekly updates and maintain quality control, ensuring your addition meets both building codes and your expectations.
How long does a typical home addition take?
Standard room additions complete from foundation excavation to final inspection. This timeline assumes normal weather conditions and no significant unexpected issues.
Complex additions involving kitchen or bathroom spaces extend timelines due to plumbing and electrical rough-in requirements. Second-story additions often require more time, as existing roof removal and weather protection add complexity. Custom millwork, special-order windows, or unique materials can add time if not ordered during the design phase. BiiLT Group maintains relationships with local suppliers to minimize material delays while providing realistic timelines that account for Harrisburg's seasonal construction challenges.
What planning steps come before construction?
Successful additions begin with comprehensive site analysis examining existing utilities, septic systems, and property boundaries. Professional surveys confirm setback compliance, while utility marking services identify underground lines requiring protection or relocation.
Design development progresses from rough sketches to detailed construction drawings specifying every component. Structural engineering calculations ensure code compliance for loads and foundations. Energy calculations demonstrate compliance with Pennsylvania's energy conservation code. Material selections finalize during this phase, allowing accurate cost estimates and advance ordering of long-lead items. BiiLT Group coordinates all planning elements, providing homeowners with a complete project manual before construction begins.


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Do I Need a Permit for a Home Addition in Harrisburg?
All structural additions in Harrisburg require building permits, regardless of size. The Harrisburg Bureau of Codes enforces the Pennsylvania Uniform Construction Code, mandating permits for any work affecting structural elements, electrical systems, plumbing, or HVAC. Operating without permits risks stop-work orders, fines, and complications during future property sales.
Beyond building permits, additions may trigger zoning reviews for setback compliance, lot coverage calculations, and height restrictions. Properties in historic districts require additional Historic Architectural Review Board approval, potentially adding 30-60 days to the approval timeline. Stormwater management permits apply to additions over 1,000 square feet of new impervious surface. BiiLT Group navigates these requirements daily, ensuring your project maintains full compliance while minimizing approval delays.
What are local zoning rules I should know?
Harrisburg's zoning code establishes specific requirements for each residential district that directly impact addition planning. Minimum setbacks in R-1 districts require distances from property lines. Maximum lot coverage limits building footprints in residential zones. The online zoning map allows property-specific research before designing additions.
Height restrictions cap structures in standard residential districts, measured from average grade to peak roof height. Accessory dwelling unit regulations permit in-law suites up to certain square footage. Parking requirements mandate off-street spaces for additions creating separate dwelling units. BiiLT Group incorporates these requirements into initial designs, preventing costly revisions during permit review.
How does BiiLT Group manage permits?
Our permit management process begins with pre-application meetings at the Codes Bureau to discuss project-specific requirements and identify potential challenges. We prepare comprehensive permit packages including detailed drawings, structural calculations, and energy compliance documentation. Electronic submission through Harrisburg's online portal accelerates review times while providing real-time status updates.
During construction, we schedule required inspections at appropriate milestones: foundation, framing, insulation, and final. Our project managers maintain inspection readiness, ensuring work areas are accessible and code-compliant before inspector arrival. Should inspectors identify concerns, we address them immediately to prevent project delays. This proactive approach maintains our 98% first-inspection pass rate while keeping your addition on schedule.

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What Materials Work Best for Central Pennsylvania Homes?
Central Pennsylvania's climate demands materials capable of withstanding temperature swings from 23°F to 86°F, according to 30-year climate data from NOAA. Fiber cement siding resists moisture, insects, and temperature-related expansion better than wood or vinyl in our freeze-thaw cycles. Metal roofing systems handle snow loads while shedding ice effectively, reducing winter damage risks. Composite decking materials maintain stability despite humidity variations that cause traditional wood to warp.
Window selection significantly impacts addition comfort and energy costs. Triple-pane windows with low-E coatings and argon fill achieve low U-factors, reducing heat loss compared to standard double-pane units. The Department of Energy's ENERGY STAR program designates our region as Climate Zone 5, recommending R-49 attic insulation and R-20 wall insulation for optimal efficiency. BiiLT Group specifies materials proven to perform in our specific climate while meeting both code requirements and homeowner budgets.
Should I match my existing roofing and siding?
Matching existing materials creates visual continuity that preserves your home's architectural integrity and curb appeal. However, exact matches aren't always possible or practical, especially for older homes with discontinued products. The key lies in harmonious blending rather than perfect matching. Color variations often disappear after weathering, while texture differences can add visual interest when thoughtfully integrated.
When original materials prove unavailable, BiiLT Group recommends strategic alternatives that complement rather than clash. For instance, if your 1960s aluminum siding is discontinued, we might suggest fiber cement in a similar profile with updated color that enhances the entire home. Roofing additions provide opportunities to upgrade both new and existing sections simultaneously, ensuring consistent appearance while improving weather protection. Our design team excels at creating cohesive additions that enhance rather than detract from your home's character.
What insulation types work best in Harrisburg's climate?
Harrisburg's humid continental climate requires insulation systems that manage both temperature and moisture effectively. Closed-cell spray foam insulation achieves R-6.5 per inch while creating an air seal that prevents condensation within wall cavities.
For above-grade walls, combinations of rigid foam sheathing and cavity insulation optimize thermal performance while managing vapor transmission. Adding 2 inches of polyiso rigid insulation outside wall sheathing achieves R-13 continuous insulation, eliminating thermal bridges through framing members. Attic spaces benefit from blown cellulose or fiberglass reaching R-49 minimum depths. BiiLT Group specifies insulation systems based on each addition's specific exposures and uses, ensuring year-round comfort while minimizing heating and cooling costs.


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How to Choose the Right Contractor for Your Home Addition
Selecting a qualified contractor determines your addition's success from planning through completion. Pennsylvania law requires contractors performing work over $5,000 to register with the Attorney General's Bureau of Consumer Protection. Verify active registration status and check complaint histories before signing contracts. Insurance verification should confirm both general liability and workers' compensation coverage, protecting you from liability for job site injuries.
Experience with similar projects in Harrisburg provides invaluable local knowledge. Contractors familiar with city permit processes, inspector preferences, and common soil conditions navigate challenges more efficiently. Request references from projects completed within the past two years, specifically asking about communication, timeline adherence, and problem resolution. BiiLT Group maintains an extensive portfolio of Harrisburg-area additions with homeowner references available upon request.
What questions should I ask during a contractor interview?
Critical interview questions reveal a contractor's qualifications and approach. Start by asking about specific experience with your addition type and similar homes in your neighborhood. Request details about their project management process, including communication protocols and change order procedures. Inquire about warranty terms—reputable contractors offer minimum one-year workmanship warranties with clear resolution processes.
Financial stability questions protect your investment. Ask about supplier relationships and credit terms that ensure material availability. Request information about crew composition—whether they use employees or subcontractors—and how they ensure work quality consistency. Discuss scheduling approaches, including how weather delays and material shortages get managed. BiiLT Group welcomes these questions, providing detailed answers that demonstrate our systematic approach to successful addition projects.
Why working with a local builder matters
Local builders bring irreplaceable knowledge of Harrisburg's construction environment. Familiarity with municipal inspectors streamlines permit approvals and inspection scheduling. Established relationships with area suppliers ensure material availability and competitive pricing. Understanding local soil conditions, from Susquehanna River Valley clay to South Mountain shale, prevents foundation surprises that derail budgets and schedules.
Community reputation motivates local builders to maintain high standards. Unlike distant contractors who may never return, local firms like BiiLT Group encounter clients at community events, children's activities, and local businesses. This accountability drives consistent quality and responsive service. Our decade-plus presence in Harrisburg means numerous completed additions serve as real-world references throughout area neighborhoods. Local builders also contribute to the community economy, employing area craftspeople and supporting regional suppliers.

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What Are the Common Design Challenges in Home Additions?
Successful additions seamlessly blend new and existing spaces while addressing technical integration challenges. Roofline connections present the most visible design element, requiring careful planning to avoid awkward intersections or water infiltration points. The International Residential Code Section R903 specifies valley flashing and step flashing requirements critical for weathertight connections. Floor level matching demands precision, as even quarter-inch variations create trip hazards and visual discontinuity.
Architectural style consistency challenges designers to respect original home character while incorporating modern amenities. A 1920s Colonial requires different design approaches than a 1970s ranch or 2000s contemporary. Window proportions, trim details, and material selections must harmonize with existing elements. BiiLT Group's design team studies your home's architectural DNA, identifying defining characteristics that new additions should echo or complement rather than contradict.
How do you connect new and old spaces seamlessly?
Physical connections between additions and existing homes require careful detailing at multiple levels. Structural connections must transfer loads properly while allowing differential movement between old and new foundations. The American Society of Civil Engineers recommends flexible connections that accommodate settling without cracking finishes. Interior transitions demand attention to flooring heights, wall alignments, and ceiling elevations.
Visual continuity extends beyond matching materials to replicating proportions and rhythms. Window spacing, header heights, and trim profiles create subconscious patterns that additions should respect. Interior trim carpentry provides crucial transition elements, with careful attention to baseboard profiles, crown molding, and door casings. BiiLT Group maintains extensive trim samples from various eras, ensuring accurate matches for period homes while offering updated interpretations for contemporary aesthetics.
How do HVAC and electrical changes get handled?
Mechanical system integration often determines addition comfort and efficiency. Existing HVAC systems rarely have capacity for significant additional space, requiring equipment upgrades or supplemental systems. Load calculations determine precise heating and cooling requirements based on addition size, insulation levels, and window areas. Ductwork modifications must maintain proper airflow balance throughout the entire home.
Electrical service upgrades frequently accompany additions, especially in older homes with limited panel capacity. The National Electrical Code requires dedicated circuits for kitchens, bathrooms, and home offices, often exhausting available breaker spaces. Service upgrades from 100 to 200 amps accommodate both addition loads and future needs like electric vehicle charging. BiiLT Group coordinates mechanical and electrical contractors during design phases, ensuring infrastructure upgrades integrate smoothly with construction schedules.


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What Should I Expect When Working with BiiLT Group?
BiiLT Group's systematic approach transforms addition concepts into completed spaces through proven processes refined over hundreds of Harrisburg-area projects. Initial consultations explore your goals, budget parameters, and timeline expectations while assessing existing home conditions. Our design-build model eliminates coordination gaps between architects and builders, streamlining communication while maintaining single-source accountability for your entire project.
Project development proceeds through defined phases with clear milestones and regular communication. Weekly progress meetings keep homeowners informed of completed work, upcoming activities, and any discovered conditions requiring decisions. Our project management software provides 24/7 access to schedules, photos, and documentation. This transparency builds trust while enabling quick resolution of questions or concerns throughout construction.
Do you offer design-build or work with architects?
Our integrated design-build services cover most residential additions, providing architectural design, engineering coordination, and construction under one contract. This approach typically saves 15-20% compared to traditional design-bid-build delivery by eliminating redundancies and improving coordination. Our in-house design team includes professionals experienced in residential architecture, structural requirements, and local code compliance.
For unique or complex additions requiring specialized expertise, we collaborate with independent architects while maintaining construction management responsibilities. These partnerships leverage outside design creativity while benefiting from our construction expertise and local knowledge. Whether using internal design services or partnering with your chosen architect, BiiLT Group ensures constructability reviews during design phases prevent expensive changes during construction.
How does your process reduce stress for homeowners?
Living through construction creates unavoidable disruptions, but thoughtful planning minimizes impacts on daily life. We establish designated construction zones with temporary barriers limiting dust migration into living spaces. Clear access routes maintain safety while preserving privacy. Consistent work schedules—typically 7:30 AM to 4:30 PM weekdays—allow families to plan around construction activities.
Communication protocols prevent surprise disruptions and maintain project momentum. Your dedicated project manager provides weekly schedule updates highlighting upcoming work that might affect utilities or access. Our client portal system sends automatic notifications for milestone completions and inspection results. Change orders follow standardized procedures with clear pricing and timeline impacts before proceeding. This systematic approach has earned BiiLT Group consistent five-star reviews from Harrisburg homeowners who appreciate predictability during potentially stressful projects.

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Can I Finance My Home Addition?
Multiple financing options make home additions accessible for Harrisburg homeowners across various financial situations. Home equity lines of credit (HELOCs) offer flexibility for projects with evolving scopes, allowing draws as needed while paying interest only on used funds. Current HELOC rates from local credit unions range from 7.5-8.5% variable. Fixed-rate home equity loans provide predictable payments for defined project budgets, with terms extending to 20 years.
Construction-to-permanent mortgages combine acquisition and construction financing, converting to traditional mortgages upon completion. These products work well for extensive additions that significantly increase property value. FHA 203(k) renovation loans wrap purchase price and improvement costs into single mortgages, useful when buying homes needing additions. Cash-out refinancing at today's rates might fund additions while consolidating existing debts, though rising rates make this less attractive than in recent years.
What loan options are available for remodeling?
Specialized renovation loan products address specific borrower situations beyond traditional home equity options. The FHA Title I program insures loans up to $25,000 for home improvements without requiring equity, helping newer homeowners fund additions. Pennsylvania Housing Finance Agency offers renovation mortgages combining purchase and improvement funds for first-time buyers.
Personal loans provide unsecured financing for smaller additions or borrowers preferring to avoid property liens. Local banks offer competitive rates for established customers with strong credit. Credit unions often provide member advantages including reduced fees and relationship pricing. Some contractors offer financing partnerships, though comparing terms with independent options ensures competitive rates. BiiLT Group provides detailed estimates supporting loan applications while working within approved budgets once financing is secured.
Does BiiLT Group help with financing referrals?
While we don't provide direct financing, our established relationships with local lenders streamline the application process for clients. We've worked extensively with area banks and credit unions whose loan officers understand construction draws and inspection requirements. Our detailed estimates meet lender documentation requirements, avoiding delays during underwriting. Upon request, we provide referrals to loan officers experienced with construction financing.
Our standardized draw schedule aligns with typical construction loan requirements, simplifying payment processing. We coordinate with lender inspectors to verify completion percentages for draw releases. This familiarity with construction lending processes prevents payment delays that could impact project schedules. By maintaining strong relationships with financing partners, BiiLT Group helps ensure your addition proceeds smoothly from funding through completion.


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What Makes Harrisburg Homes Unique for Additions?
Harrisburg's diverse housing stock reflects three centuries of architectural evolution, creating unique opportunities and challenges for additions. Downtown rowhouses from the 1800s require zero-lot-line construction techniques and party wall agreements. Post-war Cape Cods throughout suburban townships offer expansion-ready attics awaiting dormers and proper insulation. 1960s-1970s ranches provide ideal candidates for second-story additions with their robust single-story structures.
The region's geography influences addition planning significantly. Properties near the Susquehanna River face flood zone restrictions requiring elevated construction or flood venting. Homes on South Mountain's slopes need engineered foundations addressing both lateral earth pressure and stormwater management. Soil conditions vary dramatically between river valley clay and mountain shale, affecting foundation design and costs. BiiLT Group's extensive local experience navigates these location-specific challenges efficiently.
How does regional architecture affect addition design?
Central Pennsylvania's architectural heritage establishes design contexts that successful additions must respect. Germanic influenced stone farmhouses throughout Cumberland Valley feature thick walls and small windows that challenge modern open-concept additions. Victorian-era homes in Uptown and Midtown showcase ornate trim and asymmetrical massing requiring careful addition placement. Mid-century developments like Colonial Park and Progress feature consistent ranch and split-level designs where additions must maintain neighborhood character.
BiiLT Group balances preservation sensitivity with functional requirements, creating additions that enhance rather than compromise architectural character.
What local climate factors impact construction schedules?
Harrisburg experiences four distinct seasons creating year-round construction considerations. Winter temperatures below 32°F prevent concrete pours and masonry work without heated enclosures and special additives, adding costs and complexity from December through February. Spring's rain averages 3.5 inches monthly from March through May, requiring careful scheduling of excavation and roofing work. Summer humidity necessitates moisture control during framing to prevent mold growth.
Fall provides ideal construction conditions with moderate temperatures and lower precipitation, making September through November the busiest addition season. Smart scheduling sequences weather-sensitive work during favorable periods while moving interior work to winter months. BiiLT Group's project managers monitor extended forecasts, adjusting schedules proactively to minimize weather delays. Our experience with local climate patterns helps set realistic expectations while maximizing productivity throughout your project.

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Get Expert Home Addition Construction in Harrisburg Today
Your Harrisburg home addition deserves a contractor who combines local expertise with proven construction excellence. BiiLT Group transforms your vision into reality through our comprehensive design-build process, managing every detail from initial permits through final inspection. Contact us today at (717) 477-3250 or submit a form to schedule your free consultation and discover how the right addition can enhance your home's comfort, functionality, and value for years to come.